You'd have to do a little research to figure out your requirements for things like max printing dimensions and materials. I bought a Creality Ender 3 so I could print reasonably sized items (around 8x8x9 inches) with PLA filament (I didn't want to deal with potentially hazardous plastics - even PLA really should be ventilated so you're not breathing in the ultra-fine particles it produces).
What are you trying to use it for?